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move it to present the work to the grindingsurface, and means toautomatically assume control of the work-holder after such movement andto control the subsequent bodily movement thereof during the completionof the grinding operation.

6. In a grinding-machine, a rotatablegrinding-surface. means toautomatically recipro-' ment of the work-holder has been effectedthereby.

7. In a grinding-machine, a grinding-surface, and a work-holder, meansto effect their relative movement to present the work to thegrinding-surface, automatic means to thereupon assume control of andgovern such relative movement duringthe grinding operation, and a deviceto automatically render said latter means inoperative when apredetermined relative movement of the grinding-surface and work-holderhas been effected by said antomatic means.

8. In a grinding-machine, a rotatable grinding-surface,means toreciprocate it bodily, a work-holder, manually-operated means to move itto present the work to the grindingsurface, automatic means to thereuponassume control of and govern subsequent movement of the work-holder, togive the requisite shape to the work, and a device to automaticallyrelease the work-holderfrom the control of said automatic means when bya predetermined movement of the work-holder the desired grinding hasbeen effected.

9. In a grinding-machine, a rotatable grinding-surface, means to bodilyreciprocate the same, a rotatable work-holder bodily movable about afulcrum at right angles to its axis of rotation, means to move it aboutsuch fulcrum to present the work to the grinding-surface, automaticmeans to thereupon assume control of and govern subsequent bodilymovement of the Work-holder to complete the grinding, a device toautomatically release the work-holder from the control of said automaticmeans, and a spring to return the work-holder to inoperative positionwhen so released.

10. In a grinding machine, a rotatable grinder having a flatgrinding-surface, means to bodily reciprocate the grinder, a workholder,manually-operated means to move it in a lateral path to present the workto the grinding-surface at an angle thereto, automatic means tothereupon assume control of the work-holder and change the angle ofpresentation of the work during grinding, to give the requisite shape tothe work, and a device to automatically release the work-holder fromsuch control when a predetermined automatic movement of the work-holderhas been effected.

11. In a grinding machine, a rotatable grinder having a flat, annulargrinding-surface, means to reciprocate the grinder, a rotatablework-holder having its axis of rotation in a plane at right angles tothe grinding-surface, a pivot upon which the workholder is bodilymovable, to vary the angle between the intersecting axes of rotation ofthe grinder and work-holder, means to move the work-holder upon itspivot to present the work to the grinding-surface, and automatic meansto thereupon assume control of and govern subsequent bodily-movement ofthe work-holder during the grinding, to advance the work and change theangle of presentation thereof to the grinding-surface, thereby givingthe work the requisite shape.

12. In a grinding machine, a rotatable grinder having a flat, annulargrinding-surface, a work-holder to present the work to thegrinding-surface, and means to bodily reciprocate the grinder at rightangles to its axis of rotation and thereby equalize the wear upon itsgrinding-surface.

13. In a grinding machine, a rotatable grinder having a flatgrinding-surface, a support therefor, adapted to rock on a fulcrumparallel to the axis of rotation of the grinder, means to rock thesupport, and a work-holder to present the work to the grinding-surface,the reciprocation of the grinder by or through its rocking supportequalizing the wear upon the grinding-surface.

14. Inagrinding-machine,arotatableshaft, a support therefor adapted torock on a fulcrum parallel to the shaft, a grinder secured to the latterand having a flat, annular grinding-surface, means to rock the supporton its fulcrum, a work-holder, and means to move it in a lateral path topresent the work to the grinding-surface, the Wear upon the latter beingequalized by the reciprocation imparted to the grinder by rocking itssupport.

15. In a grinding machine, a rotatable grinder having a flatgrinding-surface, a support therefor, adapted to rock on a fulcrumparallel to the axis of rotation of the grinder, means to rock thesupport, a work-holder adapted to be swung in a lateral plane, topresent the work to the grinding-surface, a fixed fulcrum on which thework-holder is movable, and means to adjust the grindersupport in thedirection of the length of its fulcrum.

16. In a grindingmachine, a rotatable grinding-surface, a work-holder,including means to clamp the work, means to effect relative movement ofthe grinding-surface and the work-holder, to present the work to theformer, and means actuated automatically by or through such relativemovement to set the clamping means.

17. In a grinding-machine, a rotatable IIO grinding-surface, aWork-holder including a work-clamp, means to effect relative move-Patented Nov. l8,|902. RUCKGAUEB.

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(Application filed Sept. 13, 1901.!

(No Model.)

2 Sheets-Sheet 2. I

UNITED STATES ATENT ()FFICE.

EUGEN RI'ICKGAUER, or STUTTGART, GERMANY.

GIN.

SPECIFICATION forming part of Letters Patent No. 714,037, dated.November 18, 1902. Application filed September 13, 1901. erial No.75,337. No model.)

the art to which it appertains to make and use the same.

The present invention relates to a device for lifting and removing heavyweights, such as buildings; and it essentially consists of an apparatusfor lifting the weight and of a slide or runway for moving the wholeapparatus, together with its load. The way is of such construction thatit can be extended at convenience at the right orleft hand side bycoupling supplementary rails.

My invention will be fully understood with reference to the accompanyingdrawings, in which Figures 1, 2, and 3 represent vertical section, sideview, and top view, respectively, of the lifting apparatus; Fig. 4,ahorizontal section through A A, Fig. 2. Figs. 5 and 6 show, in verticalsection and top view, respectively, the way for removing the liftingdevice with its load. Fig. 7 is a vertical section through the same, andFig. 8 the same section through the opposite end. Figs. 9 and 10illustrate the manner of extendingthe way laterally.

The apparatus for lifting consists of a strong screw-threaded spindle 3,having a semicircular hollowed head part 4:, in which reposes theball-formed projection 8 of the carrier-plate 7 and which is securedtherein by a two-part plate 6, screwed onto the head part 4. The spindle3 revolves in a box 2, perferably of phosphor-bronze, which is locatedin a frame 1 and is secured therein by a wedge, spline, or the like. Thespindle 3 is rotated by a ratchet-wheel 10, disposed above theadjustment-ring 5 and controlled by the fulcrumed lever 9, whereby itcan be rotated to either side by the double-ended pawl 11, pivoted onthe bolt 20. For the purpose of governing the pawl 11 the same isprovided with a beveled point, against one side of which is pressed alug 13, which is under the influence of a spring 14. According to theposition of this beveled point at the right or left surface of the lug13 the one or other extremity of the pawl engages in the ratchet-wheel10. The reversal is effected by hand in turning the pawl, the lug 13being thereby retracted.

The lever 9 is provided with an extension 15, to which can be insertedthe lever 16, by means of which the spindle 3 can be turned. The weightreposes upon the carrier-plate 7 and is prevented from sliding byprojecting ribs. -Any inclined position of the load will be regulated bythe universal joint 8. For lubricating purposes I have provided aninverted-Y-shaped duct, which can be closed normally against dust by ascrew 18.

If a weight is merely to be lifted, the apparatus illustrated in Figs. 1to t only is necessary; but if it is desired to move the weightlaterally the apparatus 1, with its load, is placed upon the plate 21 ofthe way and is secured thereon by the upturned flange of this plate. Thesame runs loosely upon the rails 26 of the way and is guided thereon bya flange at the side thereof. The lateral traction is efiected byascrew-threaded spindle 23, the one extremity of which is journaled inthe projection 22, attached to the plate, while the other extremityrevolves in the interiorly-screw-threaded box of a frame 25, removablyfixed upon the rails 26, which are secured together by cross-pieces 27.In order to increase the capacity of the way, iron plates 28, projectingabout eighty to one hundred millimeters, are fixed to the sides oftherails, the extremities of said plates beingintroduced into suitablerecesses of the adjacent rails, thus extending the way indefinitely.

In order to allow of the rotation of the spindle 23 for moving the loadlaterally, the spindle is provided with a ratchet-wheel 34., removablyfixed upon the square head 24. A pawl 32 is kept in engagement with thiswheel by a spring 33. For working the pawl 32 the same is provided witha lever 35.

\Vhen the spindle 23 is turned so far that it cannot be turned more, thescrews 30 of the frame 25 are removed and the same is advanced on theways so that the holes therein register with the next series of holes 29of the rails 26. The frame is then secured again and the removal of theload continued.

By combining a plurality of such apparatus and ways buildings can belifted and removed easily.

Having now particularly described and ascertained myinvention, what Iclaim as new, and desire to secure by Letters Patent of the UnitedStates, is

l. The combination with a Way, of a platform movably mounted thereon andconnected by a threaded traction-screw'with a fixed portion thereof,means whereby the said fixed portion may be advanced relative to therails thus progressively drawing the platform longitudinally of therails.

2. The combinationwith a lifting-jack, of a platform adapted to supportthe jack and provided with an upturned flange to prevent dislodgment ofthe same, Ways supporting the

